10Pcs PCB Print Circuit Board Carbide Micro Drill Bits 0.3mm to 1.2 mm

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Product Specifications

10pcs carbide micro drill 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2mm
Shank diameter: approx. ¹⁄₈” (3.175mm)
The cutting edges strictly avoid partial hole, ensure the quality
Sharp and twisted flute will make the drilling be more easy and effortless
Suitable for wood, aluminum, plastic, etc.

Product Description

Zuela drills are perfect for delicate drilling through hard materials for model engineering, jewelry repairs, craft, archeology and scientific laboratory work

Ideal for drilling through PCB, printed circuit boards. Because, printed circuit boards require a tough micro drill and our tungsten carbide drills range will outperform similar HSS drill bits.

Specifications: Material: Carbide (tungsten steel) Diameter: 0.3mm/0.4mm/0.5mm/0.6mm/0.7mm/0.8mm/0.9mm/1.0mm/1.1mm/1.2mm Shank Diameter: 3.175mm Total lenght: 38mm Fit for: PCB drilling machines, engraving machine, CNC and high precision special drilling equipment. Quantity: 10 pieces

Summary of Features: Large drill bit chip space, chip resistance,Chip smooth, small drilling heat, reduce smear. Drill has a large scraps discharge space,little resietance and smoothly during the scraps dischange. Using high quaility materials and fine grinding process makes bit more sharp cutting edge,reduce cutting force and broken drill and improve the quality of hole wall. Cutting edge strictly symmetrical: beneficial and efficient cutting, avoid offset drilling. Carbide PCB CNC Drill Bits replacements for your CNC machines and any Handheld tool: Dremel, Jewelry.

Package Includes: 1x Case (0.3-1.2mm) Drill Bit

Product Reviews

Great PCB Drill Bits, Delivered Very Quickly

These are a varied set of 10 drill bits from 0.3 mm (0.011811 inches) to 1.2 mm (0.0472441 inches) - the 0.3 mm are extremely tiny - and fragile.I use these bits for drilling PCBs (Printed Circuit Boards). Be very careful when using these bits. Carbide tips are rather brittle and will easily break if you don’t pay attention to how the bit is used.Your drill needs to be very high speed - a standard drill press will work but due to the relatively slow speed which can require more time to drill, putting more stress on the tip which could lead to failure of the tip.Some rules to follow if you use these bits for PCB drilling/milling:a) You MUST use a high speed drill on its high speed setting; a slow drill will cause the tips to overheat and facilitate breaking.b) You MUST use a drill press and NOT an hand-held drill; If you’re using a Dremel, they have a very good and inexpensive drill press stand.c) If drilling pads on a PCB, the pads should have center holes etched out to help position the bit and prevent tip wandering on contact.d) You MUST use gentle pressure when the tip meets the material and very slow downward pressure or you will easily break the tip.e) Be CAREFUL that the tip’s angle on contact does not bend the tip in ANY way - it will definitely break if it is subject to lateral force.I use these bits with a Dremel drill on high speed using a Dremel drill press stand and they work quite well.The Dremel Drill I use is:https://www.amazon.com/gp/product/B002BAHF8W/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1The Dremel Drill Press I use is:https://www.amazon.com/gp/product/B00068P48O/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1As I previously mentioned, carbide tips are very brittle and even though you may take the above precautions a bit still may break. I recommend you purchase a couple of sets of these bits just in case.ONE CON: I found that the plastic case these bits come in is very hard to open. I actually broke the tiniest 0.3 mm tip as a result of trying to open the case - luckily I don’t use such a small bit and I did order more than one set.Therefore, be very careful how you open the case.The vendor, Zuela, got the order to me well ahead of the delivery window - really nice.Over all I am very pleased.

Hard to Find Item

these carbide drill bits fit the Dremel ¹⁄₈ drill collet and work great. They come in a easy-to-use plastic cassette case with a holder for each bit. Be careful to make sure all the bits are all the way down in the cassette before you close it as I have already lost two of the bits to breakage when closing the lid on them. My bad. These bits cover the micro range of your drill assortments. Micro as in drilling rivets in ¹⁄₇₂ scale airplanes.

Mismatched bits, improper depth setting rings, but otherwise decent.

These drills perform well, and I haven’t had one break yet, but there are some issues.First, the bits are very different in style; the cone from the shaft to the bit is different on each one, and the markings are all different styles. It looks like they randomly pulled 10 bits from different manufacturers, put them in a case, and sold them. This isn’t that bit of a deal unless you’re OCD about that sort of thing; they’re all the right size, as far as I can tell.Second, the rings around them that ar supposed to be the same distance from the tips are not. This is probably because of the inconsistency of the bits’ style/manufacturer. It isn’t that big of an issue, you’ll just have to re-calibrate any CNC machine you’re using for each bit (or make sure your g-code pulls Z up far enough for the longest bit.)Finally, the shipping takes forever. This isn’t an issue with the drills themselves, but more than a month for shipping is ridiculous.

Poor quality but okay for the price.

You get what you pay for. Lucky for me I only needed to drill a few dozen holes. First bit snapped but that was on me, decided to use dremel freehand and snapped a bit after a few holes. But after snapping two more bits while using my drill press and guide I chalked it up to poor quality metal. Was drilling into standard pcb with soft pine block under and then with no backing for the bit to drive into.These are decent for the occasional user but if you want tools that will last, avoid these.

The ones you want…

I purchased this set strictly for PCB work. However, I just ordered one set to give them a go and see how they measure up. For the price you can’t beat the quality. Will definitely order a couple of more just to have as a back up.Reading through the reviews I’ve noticed that some reviewers have broken their bits. Truthfully, the bits are easy to break if you are negligent and don’t handle them properly. These are “precession”bits; meaning patience, care, and the right tool for the job (Drill Press).If you are looking for a nice quality set of bits and working with PCBs….go for it. Takes a long time receive but worth the wait.

Clever deployment of the drill bits

These little drill bits are well built, but still suffer from the ‘too fragile’ problem of small drill bits. They are designed to operate at 2000-3000 rpm which is too great for ordinary drill motors. So use something like a dremel tool on some kind of smooth acting vertical guide to drill with them.It isn’t really that they are too weak as much as it is something about putting so much downward pressure at such a high speed that puts those tiny tips into 1000s of psi so that one little ‘wiggle’ takes them out - snap! A person simply doesn’t have that kind of handcontrol, so a little misalignment is multiplied. Also the drill has to have some form of pilot to get it to start in the right place.But buy a few of them - easy to run out.

PCB Print Circuit Board 0.3 to 1.2 mm

Very good and very sharp bits.Good quality. Fitting in my DREMEL like original tool.I recommended. Only the delivery time is long, but is not big deal.

Happy Luthier

I’m a luthier (builds and repairs stringed instruments) and I needed these a good set of micro bits to do ultra small drilling (banjo spikes). I had a set of HSS microbits, but they bent and broke if you looked at them wrong. these are carbide and when I used them in Ebony (extremely hard wood), they cut beautifully.I would rerccommend these if you need micro holes. never tried it on metal, but that isn’t why I got them. although delivery could have been quicker,but the price was right for delivery…zero.

fits the need nicely.

I use them a lot BUT be forewarned, they are VERY fragile and can easily snap. Do NOT rush or move them out of a hole too fast. Go slow and deliberate.